Re: Regulations / Standards around Dust in new developments
Phone the planning office in your local authority and ask if there are any general or specific stipulations in regard to this development. They should be able to tell you this over the phone.
I objected to a development going on behind my house - successfully, as the block of flats will now be built with more regard to the buildings adjoining it. On the final permission for the project, several stipulations were made - such as the cleaning of surrounding streets of building debris on a daily basis, and that work should go on during set times (8-6 weekdays, 9-1 on Saturday, not at all on Sunday).
The planning department have an enforcement officer who should be available to inspect sites and ensure that if there are health and hygiene issues or any other infringements of the planning regs, that they are adhered to. Let them know if you think they are being broken.
You certainly shouldn't have to stay inside with a mask on because of dust. Whether the development has planning or not, and whether you have moved into an area where there is building or not, they are causing a nuisance to your property which you would have the right to sue for, if they don't improve the situation. Maybe ask for legal advice - does the amount of dust and dirt created constitute the tort of nuisance?